This comprehensive review examines the role of HESS in modern power grids, with particular emphasis on battery -supercapacitor and battery-flywheel combinations and their applications in microgrids. BESS units ranging from 5 to 400 kWh were modeled using a Nonlinear Autoregressive Neural Network with. . The integration of hybrid renewable energy sources (HRES) like PV panels, wind turbines (WT), fuel cells (FC), microturbines (MT), diesel generators (DG), and battery energy storage systems (ESS) in microgrids provides a sustainable solution where traditional grid expansion is unfeasible. Hybrid Energy Storage Systems (HESS) have emerged as a promising solution that. . Electricity storage can shift wind energy from periods of low demand to peak times, to smooth fluctuations in output, and to provide resilience services during periods of low resource adequacy.